Kakeru moves to Matsumoto with his mother mother after she decides to move there for her own reasons. When she passes away on the first day of school after Kakeru transfers, Kakeru blames himself and thus refuses Suwa's invitation to join the Soccer club. Kakeru sees some old classmates from Tokyo, but none of them understand what Kakeru is going through. In the end, Kakeru becomes so distressed that he feels that he has no way out.
And what if he'd made a promise 
to his mom on that day, too?
وماذا إن كان قد وعد أمّه في ذلك اليوم أيضًا؟
Und was, wenn er dann an diesem
Tag mit seiner Mutter verabredet war?
¿Y si también hubiese tenido
 que ver a su mamá ese día?
¿Y si también hubiese tenido
 que ver a su madre ese día?
Et s’il avait fait une autre promesse 
à sa mère ce jour-là ?
E se anche quel giorno
 avesse avuto un impegno con la madre?
E se ele tivesse feito uma promessa 
para a mãe dele naquele dia também?
А если бы он с мамой
и на этот день договорился?